Bundle-binder seal



. 56912.16, 1952l Y J. H. LESLIE, 1I 2,610,374

BUNDLE-BINDER SEAL 2 SI-IEETS-SHEET l Filed Sept. 3, 1948 v "'l. lll l||hun "Uilm v GJ. lll

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.1. H. LEsL|E,1I

Sept. 16, 1952 BUNDLE-BINDER SEAL 24 SHEETS-SHEET 2 Filed sept. s, 1948Patented Sept. 16, 1952 UI'\`11TED? `z`vs'lfATEs rArENfr A OFFICE 'Y i2,610,374. l f

BUNDLE-BINDER SEAL `lohn H. Leslie II,"Evanst'on, Ill., assignerv toSignode Steel strapping Company, Chicago, 111;, a i `corporation ofDelawarer Application septemter 3, 194s", sei-iai No. 47,563

My invention relates to' an improved bundle-v metal, although theadvantage pertains in some degree to any strapped package, it is highlydesirable that a strap joint be ilat on both its inner and outersurfaces. Joints protruding inwardly cessive pressure or impact isbrought to bear on the joint asin the course of handling or stacking. Inthe case of sheet metaLthe sheet or sheet edges adjacent the seal willlloe injured, `and frequently, if the sheets are thin, the injury: ordent will be transmitted to mar vseveral sheets interiorlyv of the outersheet. Joints protruding outwardly from the bundle can do similar harmto other-material which may be brought against the seal in the course ofhandling or stacking, and outwardly protruding joints can interfere withVthe sometimes desirable sliding of bundleon-bundle or on other objects,and, by catching against other joints or objects, tend to loosen anddisplace the binder straps. This flatness, of course, should be obtainedwith a minimum loss of strength in the union or joint between theoverlapping ends of the bundle-encircling loops of strap binder.

The joints characterized by these protrusions,

i. e., sheared and offset portions of thefjointl edges to perfect thejuncture, have a second'fiaw. Again, when great pressure or impactr maybe applied to the joint as in handling, the protrusions may be flattenedto realign substantially the sheared portions with the bodies of theelements from which they were formed. This reduces the strength of thejoint materially. Were it possible to bend these tabs or tonguessufciently for a strong seal and still contain them within the limits ofthe inner and outer surfaces of the joint, the tabs would be protectedby these surfaces from being straightened by impact or pressure. Thismyl invention accomplishes.

One object of my invention, therefore, is to provide a seal for a strapjoint which, while maintaining good strength characteristics, has noprojections from either the inner or outer surface, that is, eithertoward or outwardly from the bound bundle.

Another object of my invention is to provide a steel strapping jointwhich is not subject to loosening by excessive pressure being applied tothe faces of the seal.

".2l claims.' (ci. 24j-213) toward the bundle may cause serious damage10' to the material strapped in the event'that exments of joint strengthmay dictate.

Other objects'and advantages'will become vapparent from'the descriptionanddrawings, 'of which:

Fig. 1 is 'aplan viewoi ythe o uter surface of va strap joint'employinga'seal embodying the features of my invention;

Fig. 2 is a plan view of thefinner surface of a joint I Fig. 3 is asection `onkthe line 3--3 of Fig. 1;'-f`

Fig. 4 isa reduced section on the linel li--ll of Fig. 1; r

Fig. 5 is a perspective ofA overlapping strap portions'suitably arrangedforv sealing, showing a seal in placement position thereover.; and

Fig; '6 is a perspective view of the completed joint. Y y. n'

`The vseal embodying my invention comprises primarily a rectangularpiece of metal having segmentsy on opposite sides thereof bent relativeto the 'main portion to define a back plate lll,' whichreally'formsthefront or exposed side of n a finished joint. This back plate I0 isapproximately equal in Width to the width of the strap for which theseal is to be employed. Twol flanges I2 depend from its opposite edges.In the particular embodiment here shown each flange has two rectangularopenings or windows It formed therein. The number of windows in eachange may be varied as desired or as require- I have chosen tov explain aseal having two windows in each flange. These windows are located to liewholly within the area of the flange in which they occur, theV inneredge I6, however, being closely adjacent tothe seal back plate I0. Theexact positioning of the inner Window edge I6 is such that, when theseal is folded, this edge will lie approximately at the center of thefold.

In the production of a seal joint the seal is placed over theoverlapping ends i8 and 2!) of the strap surrounding a bundle with theflanges directed inwardly toward the package. With an appropriate toolthe flanges are then folded in so as to lie in a plane parallel with theplane of the back plate, enclosing the strap ends i8 and 2B to dene astrap-seal resembling a sandwich. The back plate l0, being of solidmetal, has greater rigidity than the perforated flanges. The bend,therefore, will occur in the anges without deformation of the back plateand hence the minimum spacing of the fold edges may bepredeterminedrwith accuracy without using the strap edges for itsdefinition. This feature is of importance when it is desired totensionthe strap around a bundle after the placement and partial foldingof the seal because, by employing relation between the edges of thetongues 24 a seal designed in accordance with my invention, formed inthe edges of the overlapping strap porthe folds may be spaced from thestrap edges tions. Thus, not only is a strong and dependable to avoidcrimping or undesirable pressure of the joint produced but also, sincethe offsets project seal thereon. In this fashion the strap portions 5into but not inwardly beyond the windows, the are maintained slidablerelative toV the seal and joint is flat on both its inner and outerYfaces.

each other. Having described the nature and one embodi- Afterthuszfoldingether.steelsflanges-about, theyr mentY ofamy invention,.what I claim Y. and desire overlappingsstrapgendsl. either priorita orafter'f; tof-.secure iby,;Ltters Patentrof the. United States the straphas been tensioned, relatively longitul0 is:

dinally narrow notches or tongues 22, substangf,V` 1. A binder strapjoint comprising overlapping tiallf the width of the flange windows, arerst ends of the strap and a seal consisting of a back formed in the backplate and edges of 'theover-i` plaitefandfiianges surrounding andtightly fitting lapping strap ends and theniofset inwardly into i.about-,tha;overlappngfstrap ends, the flanges of but not beyond thewindow openings:v Infthisnls:theseahhaving openings wholly within theflange operation the tongues in the back plate areproborderspandvthetback plate and overlapping strap duced by actuallyslightly shearing -the metal ends being Sheare'd inwardly 310mg Oppositeedges thereof substantially in line-"Withthe'edge's=|1 itdfdrmz-tonguesyvhich are offset to prOjeCt into of the Windows. It is,however, frequentlwnnbutnotvbeyond the Openings in the Said anges.necessary similarly to shear the edges of both 20 2. A binder strapjoint. comprising overlapping strap ends because `frequently andgundersome ends ofthe strapanda sealconsistingpi a back conditionsv 'the.edges .ofltlie strap, ends-.can..be plate',and'ianges.,surroundiiigndtightly fitting offset "sufiently to provide adequate interlock;aboutJ-.tlrie-nverlappiignstrapends,` the iianges of. bymerelybendingintogbut not beyond the flange the sealh'aving .openingslwholly withinthe flange,

windows small'sections or tongues. thereoL The. 25 borderarandthe,back-.platey and edges of the overaim is 'that 'tonguesformed'.`irbothLthabckl lappingstrapends'beingpiset inwardly into butplate and the overlapping*strapl ends'i of '.'subl notQbeyondtheilangenpenings; so as .to provide stanti'allythe same width as theflange windows. shoulde'niritrloclisf:against'relative longitudinal beoiset inwardly ,suciently to lprovide pulllfremovement Abetweenthe'Iseal and the 'overlapping vsisting`interlockingshouldersbut-,not'sufiently 30fstrap,endsfandjbetwe'en the overlappingg'strap;

tocause the tonguesappreciably to pr'ojectir'ifs ends". Y

wardly beyond` the windows. JOHNHLESLIEII.

By locatin'glftlie flange windows leritirelymitlfiln Y theareaofrnenange inzwhrcnthynre idcatdf REERENCESCITED" moresmal'l tonguesare rstsheared into each.. fue of,gthispa,.bent;; side of the back plateand then Athose tongues are oisetA inwardly 'carryingmritlitliem`somev'fhat UNITEDTATE S;

corresponding edge 'portions '-of'itli'eoverlappig Nmbr'" Name'.` Datestrapends; the tonguesrfronrthe'-backplate `vnotaio 9973186 Flora?July'4, 1911 only "themselves actas ziiiterlgcks'.betvveenllthe`2,062,099 MSCLCIESHBY'; NOV. 24, 1935 strap'ends"butte'ndto"`retaintlieinterlocking 2,118,158' Crlson May 24, 1938

